The previous post about this subject contains more info, but here’s a short introduction to the problem.

Scenario:A Finnish users starts my Windows 8 XAML app. The app displays dates and times. The app isn’t localized to any language. I want the app to show the dates and times in Finnish format as that’s how she has configured her regional settings:

The problem:The app doesn’t respect her settings. Instead, all the dates and times are formatted using the US settings:

Other frameworks: Windows Forms, Console Applications, WPF, Silverlight and ASP.NET all handle this correctly: Dates and times are formatted using the regional settings:

The workaround: It’s possible to get the dates and times formatted correctly in WinRT apps. It’s just requires a lot of code. I call this a workaround until the WinRT XAML apps start behaving as they should:

Update 4.7.2013:

It seems I can get the behavior similar to Silverlight and other frameworks by setting the Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride on application startup (App.xaml.cs). For example: